The sound is the confirmation chime associated with Apple Pay, the contactless payment system built into iPhone and Apple Watch, where a successful tap is marked by a short, pleasant tone rather than a spoken message. As Apple Pay became a familiar part of everyday checkout, the chime was clipped and shared online as shorthand for spending money, treating yourself or flexing a purchase. It remains popular because listeners recognise it instantly, even without seeing a phone, and it turns an ordinary transaction into a small, shareable punchline.